3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!($is_arr = is_array($it)) && !is_object($it)) { return _js_enc_value($it); } $assoc = false; $i = 0; foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } if (!$is_arr) { $assoc = true; } $data = array(); foreach ($it as $k => $v) { $k = '"'. addcslashes($k, '"\\') . '"'; $v = _js_enc_value($v); $data[] = $assoc ? $k . ':' . $v : $v; } if ($assoc) { $spl = '{'; $spr = '}'; } else { $spl = '['; $spr = ']'; } return $spl . implode(',', $data) . $spr; } function _js_enc_value($value) { switch (true) { case is_array($value): case is_object($value): return json_encode($value); case is_bool($value): return $value ? 'true' : 'false'; case $value === null: case is_resource($value): return 'null'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_uc_esc($value) { $pattern = "/\r|(\n)|((?:[^\x09\x0A\x0D\x20-\x7E]{3})+)/"; return preg_replace_callback($pattern, '_js_uc_esc_cb', $value); } function _js_uc_esc_cb($matches) { switch (true) { case isset($matches[2]): $char = mb_convert_encoding($matches[2], 'UTF-16', 'UTF-8'); $str = ''; $len = strlen($char); for ($i = 0; $i < $len; $i += 2) { $str .= sprintf('\\u%02x%02x', ord($char[$i]), ord($char[$i + 1])); } return $str; case isset($matches[1]): return '\\n'; default: return '\\r'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, array(), new stdClass, @fopen('php://stderr', 'r')), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo @json_encode($var);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.60.0200.00318.30
8.3.50.0090.01021.89
8.3.40.0090.00618.88
8.3.30.0090.00618.67
8.3.20.0030.00618.61
8.3.10.0000.00821.07
8.3.00.0040.00423.65
8.2.180.0130.00416.75
8.2.170.0140.00322.96
8.2.160.0050.00820.44
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0060.00326.16
8.2.120.0060.00320.77
8.2.110.0090.00020.59
8.2.100.0080.00417.91
8.2.90.0060.00319.89
8.2.80.0030.00618.04
8.2.70.0050.00317.50
8.2.60.0000.00817.93
8.2.50.0080.00018.07
8.2.40.0080.00018.34
8.2.30.0000.00721.23
8.2.20.0050.00317.75
8.2.10.0000.00817.73
8.2.00.0000.00817.81
8.1.280.0180.00025.92
8.1.270.0050.00323.99
8.1.260.0070.00326.35
8.1.250.0080.00028.09
8.1.240.0000.00822.19
8.1.230.0070.00422.71
8.1.220.0030.00717.79
8.1.210.0000.00918.96
8.1.200.0030.00617.35
8.1.190.0080.00017.39
8.1.180.0000.00818.10
8.1.170.0040.00418.68
8.1.160.0000.00718.99
8.1.150.0050.00218.69
8.1.140.0070.00017.51
8.1.130.0030.00317.94
8.1.120.0000.00717.58
8.1.110.0030.00717.44
8.1.100.0000.00717.47
8.1.90.0050.00217.53
8.1.80.0050.00317.55
8.1.70.0000.00817.39
8.1.60.0040.00417.52
8.1.50.0000.00717.53
8.1.40.0080.00017.50
8.1.30.0070.00017.73
8.1.20.0040.00417.70
8.1.10.0050.00317.64
8.1.00.0040.00417.51
8.0.300.0040.00420.27
8.0.290.0000.00717.43
8.0.280.0040.00418.64
8.0.270.0080.00017.36
8.0.260.0070.00016.92
8.0.250.0000.00817.07
8.0.240.0050.00316.96
8.0.230.0000.00717.05
8.0.220.0040.00416.96
8.0.210.0070.00017.02
8.0.200.0030.00316.93
8.0.190.0030.00516.95
8.0.180.0050.00217.07
8.0.170.0040.00417.04
8.0.160.0070.00017.02
8.0.150.0000.00716.96
8.0.140.0040.00416.97
8.0.130.0040.00413.46
8.0.120.0000.00716.89
8.0.110.0040.00417.02
8.0.100.0000.00716.88
8.0.90.0030.00517.01
8.0.80.0070.01016.99
8.0.70.0030.00516.96
8.0.60.0000.00717.04
8.0.50.0000.00717.04
8.0.30.0100.01317.33
8.0.20.0120.00717.40
8.0.10.0040.00416.91
8.0.00.0140.00416.74
7.4.330.0000.00514.89
7.4.320.0060.00016.45
7.4.300.0060.00016.64
7.4.290.0030.00316.69
7.4.280.0030.00316.67
7.4.270.0070.00016.53
7.4.260.0000.00513.38
7.4.250.0040.00416.55
7.4.240.0040.00416.56
7.4.230.0030.00316.68
7.4.220.0040.01416.69
7.4.210.0070.00816.62
7.4.200.0000.00816.49
7.4.190.0050.00316.69
7.4.160.0080.00816.39
7.4.150.0030.01317.40
7.4.140.0090.00817.86
7.4.130.0100.00716.54
7.4.120.0160.00216.55
7.4.110.0090.00916.49
7.4.100.0030.01416.71
7.4.90.0060.01216.73
7.4.80.0050.01419.37
7.4.70.0040.01316.43
7.4.60.0060.01116.66
7.4.50.0030.00616.59
7.4.40.0080.00822.52
7.4.30.0090.00616.54
7.4.00.0060.00315.10
7.3.330.0060.00013.18
7.3.320.0000.00513.21
7.3.310.0000.00716.32
7.3.300.0040.00416.26
7.3.290.0130.00716.35
7.3.280.0090.00716.37
7.3.270.0140.00717.40
7.3.260.0140.00518.24
7.3.250.0090.00816.22
7.3.240.0030.01416.27
7.3.230.0140.00916.57
7.3.210.0100.01116.35
7.3.200.0110.00519.39
7.3.190.0090.01216.39
7.3.180.0070.00716.53
7.3.170.0060.01216.47
7.3.160.0060.01716.40
7.3.120.0000.01614.48
7.3.10.0020.00916.61
7.3.00.0040.01116.72
7.2.330.0120.00916.75
7.2.320.0100.00716.70
7.2.310.0120.00616.70
7.2.300.0000.02216.70
7.2.290.0170.00916.69
7.2.130.0050.00816.97
7.2.120.0040.01116.91
7.2.110.0030.01016.90
7.2.100.0050.00816.64
7.2.90.0090.00416.97
7.2.80.0020.01316.50
7.2.70.0050.01016.60
7.2.60.0080.00616.78
7.2.50.0090.00516.81
7.2.40.0080.00416.92
7.2.30.0080.00616.90
7.2.20.0080.00416.88
7.2.10.0050.00716.82
7.2.00.0070.01017.60
7.1.250.0060.00615.78
7.1.200.0030.00915.64
7.1.100.0040.00817.86
7.1.70.0070.00417.20
7.1.60.0110.01419.40
7.1.50.0040.01616.86
7.1.00.0030.06322.57
7.0.200.0060.00916.70
7.0.140.0100.06721.91
7.0.90.0500.08019.89
7.0.80.0600.08019.93
7.0.70.0530.04319.96
7.0.60.0270.08319.86
7.0.50.0600.04720.24
7.0.40.0100.05320.14
7.0.30.0100.05020.10
7.0.20.0170.07720.04
7.0.10.0030.04719.91
7.0.00.0200.05020.04
5.6.280.0100.06320.93
5.6.240.0100.06720.53
5.6.230.0070.04320.63
5.6.220.0070.08320.55
5.6.210.0130.07320.65
5.6.200.0000.08020.94
5.6.190.0270.06321.08
5.6.180.0130.07721.10
5.6.170.0130.04321.07
5.6.160.0100.08321.09
5.6.150.0070.08020.98
5.6.140.0170.05721.07
5.6.130.0070.08321.06
5.6.120.0130.04321.05
5.6.110.0100.07021.03
5.6.100.0170.04321.18
5.6.90.0070.07720.96
5.6.80.0000.04320.34
5.6.70.0200.06720.39
5.6.60.0100.05020.56
5.6.50.0070.08020.54
5.6.40.0070.04320.41
5.6.30.0100.04720.43
5.6.20.0000.05720.45
5.6.10.0100.04020.32
5.6.00.0000.05720.31
5.5.380.0100.06720.36
5.5.370.0000.04720.46
5.5.360.0130.05720.34
5.5.350.0130.04320.39
5.5.340.0070.08020.75
5.5.330.0200.06720.92
5.5.320.0100.07720.66
5.5.310.0130.07720.93
5.5.300.0000.05020.84
5.5.290.0000.05720.88
5.5.280.0100.04320.75
5.5.270.0100.08320.92
5.5.260.0030.09020.75
5.5.250.0030.05720.70
5.5.240.0070.08320.31
5.5.230.0100.07020.22
5.5.220.0070.04020.30
5.5.210.0070.04020.16
5.5.200.0030.04020.26
5.5.190.0000.04320.30
5.5.180.0170.04320.12
5.5.160.0030.05320.25
5.5.150.0030.07720.29
5.5.140.0070.07020.16
5.5.130.0070.04020.26
5.5.120.0030.06720.22
5.5.110.0070.04720.28
5.5.100.0100.04720.17
5.5.90.0130.07720.05
5.5.80.0070.04320.08
5.5.70.0000.05320.16
5.5.60.0070.04720.08
5.5.50.0070.04320.02
5.5.40.0170.07319.95
5.5.30.0100.06719.95
5.5.20.0100.06719.95
5.5.10.0030.05720.07
5.5.00.0100.07320.05
5.4.450.0070.04719.36
5.4.440.0070.08019.45
5.4.430.0170.06719.41
5.4.420.0130.05719.20
5.4.410.0100.07019.22
5.4.400.0100.04019.12
5.4.390.0170.07019.21
5.4.380.0070.06719.13
5.4.370.0070.04019.03
5.4.360.0070.03719.13
5.4.350.0030.04319.14
5.4.340.0070.06718.85
5.4.320.0030.05019.03
5.4.310.0070.08019.02
5.4.300.0070.06319.13
5.4.290.0030.08018.87
5.4.280.0070.04319.04
5.4.270.0130.07019.04
5.4.260.0130.07019.03
5.4.250.0030.06719.18
5.4.240.0130.04318.88
5.4.230.0030.07719.23
5.4.220.0130.07719.08
5.4.210.0130.06719.03
5.4.200.0070.07719.20
5.4.190.0070.04319.15
5.4.180.0130.07319.03
5.4.170.0070.07318.99
5.4.160.0000.04318.86
5.4.150.0030.04318.93
5.4.140.0000.05016.46
5.4.130.0030.05016.20
5.4.120.0070.07016.33
5.4.110.0130.05016.54
5.4.100.0030.04716.38
5.4.90.0030.08016.56
5.4.80.0030.07316.33
5.4.70.0100.04016.52
5.4.60.0070.06316.27
5.4.50.0130.06316.46
5.4.40.0130.06716.50
5.4.30.0030.04716.44
5.4.20.0000.06716.42
5.4.10.0070.04716.48
5.4.00.0030.05315.81
5.3.290.0030.07714.72
5.3.280.0030.04714.73
5.3.270.0100.07314.66
5.3.260.0070.05014.69
5.3.250.0070.04014.70
5.3.240.0030.07714.56
5.3.230.0070.04714.64
5.3.220.0000.06314.61
5.3.210.0130.07014.56
5.3.200.0030.07314.62
5.3.190.0030.07014.58
5.3.180.0070.07314.57
5.3.170.0000.05714.55
5.3.160.0030.07714.62
5.3.150.0130.06714.58
5.3.140.0030.07014.64
5.3.130.0070.07314.59
5.3.120.0000.07714.64
5.3.110.0030.05014.53
5.3.100.0100.03314.05
5.3.90.0030.04314.01
5.3.80.0100.07014.10
5.3.70.0170.06714.10
5.3.60.0100.03313.92
5.3.50.0100.06713.88
5.3.40.0100.04014.11
5.3.30.0100.04313.84
5.3.20.0100.04713.86
5.3.10.0030.06313.67
5.3.00.0030.06313.57
5.2.170.0030.05711.20
5.2.160.0070.05311.23
5.2.150.0070.06311.27
5.2.140.0000.06311.10
5.2.130.0070.05011.02
5.2.120.0070.06011.27
5.2.110.0070.05311.05
5.2.100.0070.05011.16
5.2.90.0000.06711.14
5.2.80.0030.06311.26
5.2.70.0070.04711.18
5.2.60.0100.05311.22
5.2.50.0030.06311.19
5.2.40.0000.05711.15
5.2.30.0100.03310.90
5.2.20.0030.06310.84
5.2.10.0030.04710.82
5.2.00.0000.03010.68
5.1.60.0170.03710.54
5.1.50.0030.03310.54
5.1.40.0030.05310.54
5.1.30.0070.05310.54
5.1.20.0100.03010.54
5.1.10.0000.05010.54
5.1.00.0070.05010.54
5.0.50.0070.04710.54
5.0.40.0100.02710.54
5.0.30.0130.04710.54
5.0.20.0030.03010.54
5.0.10.0070.04010.54
5.0.00.0030.05710.54
4.4.90.0000.02710.54
4.4.80.0000.03710.54
4.4.70.0070.03010.54
4.4.60.0030.02010.54
4.4.50.0030.01710.54
4.4.40.0070.05010.54
4.4.30.0000.02710.54
4.4.20.0000.04010.54
4.4.10.0030.03310.54
4.4.00.0000.05310.54
4.3.110.0030.03710.54
4.3.100.0070.03010.54
4.3.90.0100.02710.54
4.3.80.0030.05010.54
4.3.70.0000.03310.54
4.3.60.0030.03310.54
4.3.50.0030.03010.54
4.3.40.0030.05010.54
4.3.30.0000.03310.54
4.3.20.0030.03310.54
4.3.10.0000.03310.54
4.3.00.0000.02310.54

preferences:
40.03 ms | 401 KiB | 5 Q